Oxmoor PRM-8 - Manual (Page 12)

PRM-8 PROGRAMMING (CONTINUED)
Page 10
3.2 Update Parameter of Device Channel (96 hex)
Data Transmitted:
Byte# = 1
Valid Data Range = 0 or 1
Description = 0 = Enable front panel trim
pots for Page function
1 = Disable trim pots and use
PA-422 data for Page
function
Byte# = 2
Valid Data Range = 0-FF hex
Description = Program source level
defined for all 8 channels.
(0 to -48dBu, -80dBu = off)
Byte# = 3
Valid Data Range = 0-FF hex
Description = Program source fade in time
after page function is disabled.
(0 to 5 seconds)
FF hex = 5 seconds fade in time
0F hex = 2.5 sec. fade in time
00 hex = 0 seconds fade in time
Program source attenuation
levels can be calculated as
follows:
Attenuation (dBu) = 20 Log [
(Vin / 0.7747) (decimal value /
256)]
For example:
0F hex (15 decimal) = value
transmitted 0.7747v = Vin input
-24dBu = 20 Log[ (1) (15 /256) ]
Other example values for input
voltage of 0.7747v (Vin) are:
FF hex equals 0 dBu attenuation
0F hex equals -24 dBu attenuation
01 hex equals -48 dBu attenuation
00 hex equals -80 dBu attenuation
Data Received: none
Byte# = 4
Valid Data Range = 0-FF hex
Description = Program source fade out time
for enabled page function.
(0 to 5 seconds)
FF hex = 5 sec. fade out time
0F hex = 2.5 sec. fade out time
00 hex = 0 sec. fade out time